Servis - EOS C100 Dual Pixel CMOS AF Autofocus nadogradnja
The EOS C100 is a large sensor video camera that’s designed with the single shooter in mind – it already offers functions such as One-Shot AF, Push Auto Iris, auto white balance and a built-in microphone to aid individual camerawork. The Dual Pixel CMOS AF upgrade for the EOS C100 will expand the shooting possibilities by providing smooth, accurate autofocus with a huge range of lenses. For cameramen requiring more precise control the responsiveness of the One-Shot AF function has been greatly enhanced with increased focus speed.
The upgrade utilises the existing Super35mm sensor in the EOS C100 and is available both as an extra-cost option for existing owners*, or as an out-of-the-box option for new buyers. The upgrade can be booked in at the Canon Regional Competence Centres* in France, Germany, Italy, Sweden or the UK – see later on in this article for more details of how to do so.
FILMMAKER PHILIP BLOOM ON AF WITH THE EOS C100
Filmmaker Philip Bloom was one of the first people to try out the Dual Pixel CMOS AF upgrade on the EOS C100 on location in the USA and, in an exclusive film, he reveals his first impressions of working with AF, using Canon lenses and the best way of working with the autofocus system of the EOS C100.
HOW DOES DUAL PIXEL CMOS AF WORK?
Dual Pixel CMOS AF is a sensor-based, phase-detection autofocus (AF) technology that’s designed to provide smooth, high-performance continuous focus in movies. It is a unique, Canon-developed technology, ideal for fast and accurate autofocus, helping filmmakers to create stunning footage which maximises the creative options offered by fast lenses and shallow depth-of-field.
The EOS C100 camera with Dual Pixel CMOS AF technology features a CMOS sensor that consists of an array of pixels that each feature two separate photodiodes. By continuously comparing their outputs during AF Mode, phase-difference autofocus helps to ensure non-blurred images and smooth focus transitions even when the subjects and/or camera are moving. The new feature places a high priority on maintaining sharp focus while, providing a natural, smooth autofocus movement with selected Canon EF lenses that offer even smoother and quieter operation.
After this modification, the EOS C100 camera's Continuous AF function active area represents 20% of the image vertically and 25% horizontally, yielding a very large, centrally located autofocus zone. The AF Lock mode allows you to set focus and hold it, allowing you to change framing while maintaining the original point of focus.
DUAL PIXEL CMOS AF COMPATIBILITY WITH EF LENSES
Dual Pixel CMOS AF provides continuous autofocus with the majority of EF lenses1, spanning EF and EF-S, fixed focal length, wide-angle and telephoto lenses. One-Shot AF operation is supported by selected EF lenses. The system marks a significant advance with greatly improved AF speeds.
Please click here for a list of lenses that are not supported by the Dual Pixel CMOS AF system.
FAST, SMOOTH AF DURING VIDEO CAPTURE
A modified EOS C100 camera’s set-up menu offers two options for ‘AF Mode’ – One-Shot AF and Continuous Autofocus. The AF Lock function can optionally be set to one of the camera’s assignable buttons. During shooting you press this button to lock the focus, preventing the camera from re-focusing, and then press it again to re-enable Continuous AF.
The Dual Pixel CMOS AF technology helps to provide smooth and consistent autofocus, so that focus transitions are natural looking and that subjects can remain focused even as they move. The compatibility of Dual Pixel CMOS AF with Canon EF autofocus lenses combines outstanding optical tools with a wide range of creative options.
By using the Contrast AF system to supplement the EOS C100’s new Dual Pixel CMOS AF the camera can determine which direction to initially drive the lens, thus helping to reduce focus hunting.
FASTER ONE-SHOT AF MODE
The combination of Contrast AF and Dual Pixel CMOS AF helps to ensure that the EOS C100’s AF system initially drives the lens in the correct direction, resulting in faster focus acquisition. The upgraded EOS C100 camera will focus significantly faster than an unmodified camera with a more natural look and no focus over-shooting. Because the current One-Shot AF mode uses only Contrast AF, movements can sometimes be jerky with over-shoot errors.
DUAL PIXEL CMOS AF IN THE C100: KEY FEATURES
Continuous AF with the majority of EF and EF-S lenses1
Improved One-Shot AF performance
AF Lock function allows user to change the framing
Stable AF movement
Reduced focus ‘hunting’
1 Excluding Manual focus lenses
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